Headline: Park Service Consider Entrance Fee IncreasesLink: https://www.heartland.org/news-opinion/news/park-service-considers-entrance-fee-…Publication Date: Tuesday, March 6, 2018Primary Source: Heartland InstituteNon-Cato Author: Joe BarnettType: new media postFormat: New MediaNature of Mention: featuredScholar: O'Toole, RandalResearch Area: Energy and EnvironmentSubjects: the National Park Service